Automobile lock



July 2, 1929. K. FOUGHT ET AL 1.719.539

AUTOMOBILE LOCK Filed Nov. 29, 1926 Patented July 2, 1929.

UNITED STATES 1,719,539 PATENT oFF lcE'.

EMORY K. FOUGHT AND ESMOND G. WHITNEY, F TOLEDO, OHIO.

AUTOMOBILE LOCK.

Application filed November 29, 1926. Serial No. 151,363.

This invention relates to restricted con Fig. 2 is a wiring diagram'ofthe inven-v tion, the device being shown with parts broken away; and

F 3 is an additional wiring diagram. showing the apparatus having itsunit differently connected to the engine from the showing in Fig. 2. 1

Motor vehicle 1 is shown as provided with nudti-cylinder internalcombustion englne 2 normally connected to drive generator 3 in theignition circuit which circuit is pro vided with distributor 1 andinduction coil 5. The instrument boardfi is provided with ignition lockswitch 7. Carried by the motor vehicle 1 is storage battery 8 havingline 9 therefrom to ground 10 with the motor vehicle chassis.

From this battery 8 extends line 11 past starting switch 12 to startingmotor 13. From the line 11 there is line 14- extending past circuitbreaker 15 by line 16 to generator 3 normally having its shaft actuatedby the operation of the engine. From this generator 3 extends line 18 toground 10 in completing its circuit. This battery 8, or the generator3during the operation of the engine for driving, serves as a currentsupply by way of line 19 past a current meter 20 to the ignition lockswitch 7. Distributor 4: has branches 22 to the various spark plugs 23.A step-up transformer or induction coil 5 is in the circuit between theignition switch 7 and the distributor 1.

In carrying outthe invention hereunder, this ignition circuit betweenthe switch 7 and the distributor AL has placed therein a wiring assemblyincluding the device of this invention. Housing 25 is preferably mountedon the dash or instrument board 6 and has extending therefrom conduit 26of the wiring assembly. In this conduit 26 are conductor lines 27 28,29. The lines 27 28, may extend to the ignition switch 7 and the coil 5or to the coil 5 and the interrupter a.

The line 27 enters the housing 25 and extends to terminal 30 where itmay be connected by a contact 31 with terminal This contact 31 is inhousing or box 33 and is shown as operable by a lock having a key 3 1.The line 28 extends to terminal 32. The line 29 connected to the line 16from the generator 3 extends to insulated terminal35 in the housing 25and has therefrom line 36 to winding 37 with the circuit. therefromcompleted by line 38 to ground 10. V With the contact 31providingcommunication between the terminals 30 and32, the closing ofthe ignition switch 7will cut in the ignition circuit for normaloperation for starting and running the engine 2. The line 29 from thegenerator 3 has current flowing therethrough to the winding 37. As themo tor 2 is idling there is insufficient amperage to render the winding37 effective through its core 38 for operatingarmature 39 against theresistance of spring 40. The spring 40 is connected to arm 41 of thearmaturepivoted on fulcrum 11. This spring 40 normally holds thearmature lever 39 closed at contacts 12, 43, at this switch in thecircuit by-passing the switch at the contact 31. From the line 27adjacent the terminal 30 extends line a l past manually operable toggleswitch L5 to line 416 connected to spring carrying member 17 whichserves to mount the fulcrum 11. This member 17 has insulation mounting48. From the line 28 adjacent to the terminal 32 extends line d9 to themember carrying, contact 13. This member 50 is mounted on'insulationblock 51 in the housing 25. I

ith the ignition switch 7 closed, the lock contact 31 in open switchposition and the key 3% withdrawn, the motor 2 may have idlingoperation. However, should an unauthorized person attempt to drive awayin the automobile, in so doing a load would be put on the motor bygiving fuel so that, itwould pick up] This brings about a flux ofincreased current in the line 29 from the generator 3 which energizesthe coil 37 sufficiently to open theswitch 12, 13. y This automaticallyopens theby-pass about the contact 31 for the lines 27, 28, and therebycauses an interruption in the circuit to the coil 5 or tothe distributor4;. This causes the motor to puff or seemingly misfire in a mannerFimitating engine action due to lack of fuel or ignition trouble. Theengine at once drops in speed, thereby reducing the current in the line29. The spring 4L1 recloses the by-pass switch 42, 43. The motor willthus have its circuit closed for continued idling. Building up generatorac tion occurs at accelerating of the motor. W'hen motor driving attemptis continued, the device of this inventionwill repeat the automaticstrangling of the ignition circuit and will continue so to-do'as oftenas the motor is 'speeded up.

The installation of this safety unit is one which'may'bereadilyaccomplished in the "usual type'of motor vehicles which-haveaseparate generator from the motor and which includea storage orsecondary batt'ery. To this end from the side of the generator not toground andbetween such side to"thisdevice through a coil to ground.

and the relay, there is connected a line It will thus be seen that thereis no energizlng 'of'this coil from-the storage battery because 'it isisolated from the battery. by the relay.

TV hen the carmotor is started to operate the'generator, the initialstarting'does not at once open therelay, so for such interval there isbut slight current flow through the its armature before the relay acts.farm'ature shifting by the co1l'1so-ne which coil at'the deviceasdeveloped by the generat'or. iVhen thefspeed ofthe motor is sufficientto cut "in the relay, there is charging current.

In practice, it 'is desirable to have the coil in this device one whichwill be effective on This is connected to affect the ignition circuitand is located on either side of the ignition coil between "the ignitionswitch and the circuit breaker. AccordinglyWvhen the coil of the de'viceopens its switch, there is at once a breaking otthe ignition circuitcausing the" motor to slow down and when such slowingdown' results inthe decreased speed of the generator to such extent that the coil doesnot hold the switch open, there is effected a re-closing of this circuitfrom the ignition switch to cut in the ignition" for keeping the motoridling.

By the operation of the key to the device this ignition circuit line isout in independ- "ently of this switch of the coil so that the I vehiclemay be operated normally.

' 1coritact 31 either by tumbler or key type of lThe contact 31 may beleft in switch This action may lead the car thief or unauthorized one tobelieve' there is a lack of "fuel for the motor.

vention herein is an effective safeguard against driving of motorvehicles under their "own power. It is thus seen that the ignition"switch 7 "may be'left closedand the use of In this manner the inthe carrestricted by theoperation of the closed"position and a minor subterfugeadopted for the car safety in the form of the manually operable switch45- concealed by the instrument board 6.

The device of this disclosure is one which may be installed generally,even as an accessory, with its simplified wiring assembly and' may beinterposed as suggested herein for its switch connection with theautomatic control affecting such switch with such automatic controlconnection from the generator.

W Vh'at is claimed and it is desiredto secure by Letters Patent is:

l. A theft prevent-ion control for an intornal combustion engine havingan ignition circuit, a generator actuable by the engine, a switch, aline from said'generator having means therein a ii'ected'bygeneratoroperation to .open said switch 'onlywh'en said generator isactuated bythe engine running at a higher than ldlmg speed, and manuallyshiftablc means for rendering said ignition circuit eiiectiveindependently"of disturbance by generator operation.

2. An internal combustion motor, an ignition circuit therefor includinga generator actu'able by the motor, a switch in said *circuit, a linefrom said generator isolated for receiving currentsupply only fromthegenerator operation for operating-said switch only when saidgenerator is actuated by the engine running at a l'iigher than idlingspeed, and manually shiftable means forspeed, and manually shiftablemeans for rendering said. ignition circuit effective independently ofdisturbance by generator op eration.

4. An internal combustion motor pelled vehicle having a generator, anignition circuit supplied by said generator, a.

theft prevention control device for'the motor including a line to saidgenerator having means therein operated by said generator for openingsaid lineuponpredetermined gen- "eation by the generator, manuallyshiftable means for rendering said ignition circuit eii'ectiveindependently of disturbance by generator operation, and a Winding inthecircuitto which said line extends.

5. An internal combustion motor propelled vehicle havinga=gen-er'ator,'- an ignition circuit supplied by said generator, a lineto said generator, a winding irr=said circuit proto which said lineextends, a theft prevention winding actuated switch, and a manuallycontrolled switch for by-passing said winding.

6. An internal combustion motor propelled vehicle having a generator, anignition circuit supplied by said generator, an ignition switch forcutting in said circuit, and a theft prevention control device for themotor including a line to said generator, means in said line operable bypredetermined generation by the generator, a winding in said circuit towhich said line extends, and in addition to said ignition switchamanually controllable lock for cutting in the device for rendering thedevice effective for restricting motor operation with the ignitionswitch closed.

7 An internal combustion motor, an ignition circuit therefor including acoil, an ignition switch, a generator actuable by the motor andproviding a current supply for the circuit, a switch device in thecircuit, a line isolated for receiving current supply only from saidgenerator operation for operating said switch device at predeterminedgeneration by the generator, and means for theft prevention providing alock for the switch device for rendering the device effective forrestricting motor operation with the ignition switch closed.

8. A motor vehicle having an ignition circuit, a generator for supplyingsaid ignition circuit actuated by said motor, and a theft preventionauxiliary circuit embodying a switch for cutting in said auxiliarycircuit permitting the ignition circuit to function during motor idlingand rendering said ignition circuit ineffective upon higher speeds, anda manually controllable lock for rendering the auxiliary circuit noteffective and modifying the ignition circuit. 7

9. An internal combustion engine propelled motor vehicle, an ignitioncircuit therefor including a generator operated by the vehicle engine, awinding, a switch for connecting the generator for supplying current tothe winding, an electric controller for the switch effective at aboveengine idling speed operation of the generator for opening said switch,and a manually controllable lock for rendering the winding not effectiveand modifying the ignition circuit.

10. An internal combustion engine propelled motor vehicle, an ignitioncircuit therefor including a generator operated by the vehicle engine, awinding, a circuit for connecting the generator for supplying current tothe winding, an electric controller for the circuit effective at, aboveengine idling speed operation of the generator, and a manuallycontrollable lock for rendering the winding circuit not effective andmodifying the ignition circuit.

11. A theft prevention unit including a lock, a coil switch to be cut inand out by said lock, conductor connections for the coil, a generator towhich said connection extends for operating the switch, a motor, anignition circuit therefor rendered ineffective by motor speeding up tocause the generator to operate the coil switch in thereby opening saidignition circuit, and additional c011- ductor connections from the unitto be controlled by said switch and lock.

12. A theft preventing unit including a lock, a first switch, a coil forthe switch to be cut in and out by said lock, relay means, a generator,conductor connections from between the relay means and generator to thecoil, an ignition switch, a circuit breaker, and means for placing saidfirst switch be tween said ignition switch and said circuit breaker.

In witness whereof we affix our signatures.

EMORY K. FOUGHT. ESMOND G. W'HITNEY.

